Welcome to the Design Patterns course. For the next five Wednesdays we’ll spend two hours per day walking through one of the most important software design tools of the last thirty years: Design Patterns. All programmers who aspire to professionalism and craftsmanship should know these patterns, and be skilled in their application.

In this course, you will learn how, when, and why patterns are useful, and how to take the greatest advantage of them in your daily work.

Our primary reference will be the book: Design Patterns: Elements of Reusable Object-Oriented Software, by Gamma, Helm, Johnson, and Vlissides (The Gang of Four).

As you can see from the schedule below, each week we’ll cover a small collection of patterns. Each lesson will involve a mixture of white-board lectures using UML, and/or the review of some code.

Week 1: 3 Feb 2021

Introduction

Adapter

Strategy & Template Method.

Factories

Week2: 10 Feb 2021

State Machines.

The State Pattern.

Singleton & Monostate.

Null Object.

Week 3: 17 Feb 2021

Command.

Composite.

Visitor.

Acyclic Visitor

Week 4: 24 Feb 2021

Decorator.

Proxy.

Observer.

Model-View-Controller.

Week 5: 3 Feb 2021

Mediator.

Facade.

Bridge.

Chain of Responsibility.

Patterns in OO vs Functional languages.

Conclusion.